Precision roller socket adjustment device



A. Z BENDA ET L PRECISION ROLLER SOCKET ADJUSTMENT DEVICE Sheet A ril 29, 1969 Filed June 29,

Sheet 5 of 4 A. Z. BENDA T L INVENTOR. ALEXANDER Z. BENDA RICHARD WOESSNER April 29, 1969 PRECISION ROLLER SOCKET ADJUSTMENT DEVICE Filed June 29, 1967 A. Z. BENDA ET AL A ril 29, 1969 PRECISION ROLLER SOCKET ADJUSTMENT DEVICE Sheet 4 of4 Filed June 29, 1967 INVENTOR. ALEXANDER Z.BENDA RICHARD WOSSNER United States Patent "ice US. Cl. 101-349 8 Claims ABSTRACT OF THE DISCLOSURE A device for adjusting the position of the roller socket of an ink motion having a solid shaft carried within a hollow shaft, each carrying a screw pinion having helical gears. The screw pinions engage helical gear segments which are fixed to a lever pivotally mounted about a bushing of the adjacent ink drums, each lever carries a roller socket. A knob mounted on an end of the solid-hollow shaft combination for rotating them individually or simultaneously whereby the screw pinions are caused to be axially displaced so as to cause rotation of the levers thereby adjusting the position of the roller sockets.

Background of the invention This invention relates generally to printing presses and more particularly to a socket adjustment for the form rollers of a printing machine ink motion.

The conventional ink motion of rotary printing presses comprises a fountain roller, transfer rollers which transfer ink from the fountain roller through a series of ink drums and ink rollers to a printing plate cylinder. The ink rollers which transfer ink from the last ink drum to the plate cylinder are comprised of a number of soft-surfaced form rollers. The amount of ink to be transferred to the plate cylinder depends on the pressure which the form rollers exert on the plate cylinder and the ink drum.

It is commonly known that the form rollers tend to swell with continued use and with changes in ambient conditions, thereby resulting in a change of pressure which the form rollers exert on the plate cylinder and ink drum. It is therefore necessary that the form rollers be mounted in adjustable sockets so that the proper pressure can be maintained.

In order to determine the pressure exerted by the form rollers, and therefore whether or not adjustment is required, it was heretofore necessary to stop the press and by means of three layered slip-sheets inserted between the rollers and plate cylinder observe the ink impression thereon. Such a method for determining the pressure is inaccurate, unreliable and costly in that it requires the efforts of two mean and a stoppage of printing. Alternative methods for setting the pressure have been equally unsatisfactory.

The use of recently developed thin wrap-around printing plates has necessitated a greater degree of precision in distributing the ink from the form rollers onto the printing plate cylinder. The thin printing plate comprises raised printing surfaces and shallow non-printing areas between these surfaces. It is the function of the form rollers to distribute ink on the raised printing surfaces only. It would be highly objectionable to deposit ink on the non-printing areas because of the possibility of transferring this ink to the paper in areas which are not intended to have print.

Since it is the pressure of the form rollers exerted on the printing plate cylinder which determines the amount of ink deposited thereon and whether or not any ink will be deposited in the non-printing areas it is necessary especial- Patented Apr. 29, 1969 1y when using the thin plates, to precisely set and regulate that pressure so as to make sure that no ink is deposited in the shallow non-printing areas.

Heretofore, the use of thicker plates did not present as great a danger of transferring ink from the non-printing areas to the paper because the non-printing areas on the thick plates are much deeper than on the thin plate. Consequently, the degree of precision in setting and maintaining the pressure of the form roller on printing plate cylinder was not as critical when using the thick plates. The prior art devices have been unsuccessful in obtaining the precision pressure adjustment now required for printing with thin plates.

It is therefore an object of this invention to provide a means to achieve a high degree of precision adjustment of the form roller sockets, and to do so without stopping the press.

Anther object of this invention is to provide a device whereby the operator of the press can set the form rollers to the proper pressure adjustment on the printing plate cylinder by means of visual indicator means.

Another object of this invention is to provide means for visually indicating whether or not adjustment of the form rollers is necessary without waiting to see if too much or too little ink is distributed on the printed paper, and then to adjust the roller sockets to a desired setting by use of a visual means.

Various other objects and advantages will become apparent from the following description, and the novel features will be pointed out hereinafter in the appended claims.

Brief description of the drawings In the drawings:

FIG. 1 is a schematic side elevational view of a magazine press ink motion to which the present invention may be applied;

FIG. 2 is an enlarged detail of Box 2 in FIG. 1;

FIGS. 3 and 4 are views of FIG. 2 as seen along arrow A and partially broken away;

FIG. 5 is a section along line 5-5 of FIG. 2;

FIG. 6 is a section along line 66 of FIG. 5;

FIG. 7 is a view of FIG. 4 showing one feature of the present invention; and

FIG. 8 is a somewhat schematic elevational view of FIG. 7.

Description of the preferred embodiment of this invention The present invention as shown and described herein may be applied to ink motions of various arrangements. The particular embodiment as shown and described herein however, is for particular use in the typical magazine press unit. The ink motion of such a unit is schematically shown in FIG. 1 with the frame 101 carrying the ink motion being so mounted as to be rolled away from impression cylinder 103.

This invention is primarily concerned with a mechanism for adjusting a single form roller. However, since all ink motions commonly used are supplied with a plu rality of form rollers, and since it is common practice to have two form rollers transfer the ink from a single ink drum to the printing plate cylinder the preferred embodiment of this invention will now be described with reference to a mechanism for adjusting a pair of form rollers.

As seen in FIG. 3 a reciprocating ink drum 104 is carried between frames 101 and 102 supported by bushings and 106. The shaft of the drum 104 passes through the bushing 105 and frame 102 for connection with a mechanism for causing reciprocation of the drum, which is not shown in the drawings and not needed for an understanding of the present invention. The form rollers 107 and 108 which transfer the ink from the reciprocatwithout affecting the pressure adjustment of the near side. This can be accomplished by sliding knob 161 to a third position such that neither the keys 162 are in engagement with keyways 167, nor are gears 163 and 165 in mesh. When the knob is in this position a pin wrench not shown, can be inserted into bore 160 of collar 157 and only shaft 123 can now be rotated by manually moving the inserted pin wrench through the desired angle. When only shaft 123 is rotated, only socket 111 will be adjusted.

A dial indicator 168 is rotatably mounted around collar 156 for the purpose of obtaining a precise pressure setting for the form roller. A pointer 169 is secured to the dial indicator by means of screw 182. A dial face 170 is fixed to frame 145 by means of screw 171. The dial face is provided with markings to indicate the amount of flat which is desired. The 0 marking will indicate merely surface contact of the form roller with the printing plate cylinder. When a larger flat is required, one of the markings other than 0 as for example Ms", A1." or /3" will be used as a guide. Secured to dial indicator 168 by means of pin 181 is a spur gear 172 which meshes with spur gear 173 which is attached to a block 174 by means of bolt 175. Block 174 is rotatably mounted about pivot pin 180 which passes through frame 145. Pivotally mounted about pin 180 is pivot bar 176. Pivot bar 176 is provided with pin hole 149, and block 174 is provided with pin holes 178 and 179. Pin hole 178 on block 174 is aligned with pin hole 149 on bar 176. A setting pin 177 can be inserted through pin holes 149 and 178. A stop pin 183 is set in frame 145.

In order to precisely set the form roller to the desired fiat, knob 161 should first be set into its second position so that both shafts 123 and 125 can be rotated simultaneously. With the knob in this position it should be rotated in a counterclockwise direction. This will cause dial indicator 168 and gear 172 to rotate with the knob, because pointer end 195 of key 162 will engage a serrated edge 194 on dial indicator 168. Consequently, gear 173 will rotate in a clockwise direction. With setting pin 177 inserted in pin holes 149 and 178 marked BACK OFF, block 174 and pivot bar 176 will also rotate in the clockwise direction. Knob 161 should be continued to be turned until setting pin 177 hits stop pin 183. Pointer 169 will now indicate on dial face 170 that the form roller is in its back off position. Form roller 107 will now be at its maximum position away from printing plate cylinder 109.

The operator of the press will follow this procedure on all the form rollers so that none of them will be in contact with the printing plate cylinder. This now allows the operator to set each form roller into :proper fiat arrangement with its respective reciprocating drum by adjusting the eccentric setting (as shown in FIG. 2) of the form rollers shaft.

Once the form rollers are set with respect to the reciprocating drum the operator will now set the form rollers into proper flat on the printing plate cylinder by means of the present invention. This will be accomplished by turning the knob 161 in a clockwise direction to its original position. The pointer 169 will now point to the 0 reading on the dial face 170. This will indicate that the form roller 107 is now in initial surface contact with the printing plate cylinder 109, but without exerting a pressure thereon. In order to now precisely set the form roller to the exact flat relationship or pressure exertion on the cylinder 109 the operator will remove setting pin 1177 from pin hole 178 and place it in pin hole 179 which is marked MAX. FLAT on a plate 196 affixed to gear 173. Knob 161 can now be rotated in a clockwise direction resulting in a counterclockwise movement of gear 173, block 174 and setting pin 177. When setting pin 177 hits stop pin 183 the form roller will be in its most accepted maximum flat position on the printing cylinder which corresponds to fiat. The pointer 169 will therefore point to the mark on the dial face 170.

The amount of flat required or desired by a particular press will depend on many factors including type of ink, type of press, experience of the operator, etc. If the operator determines that the fiat setting should be other than he can simply turn the knob 161 in a counterclockwise direction until the pointer 169 points to whatever setting is desired, for example Ms" or A" or anywhere between 0" and This will result in a rotation of shafts 123 and 125 in a counterclockwise direction and will consequently cause form roller 107 to back off from printing plate cylinder 109 until the desired flat is obtained. The setting pin will remain in the MAX. FLAT pin hole 179 during operation of the press. If the pressman observes that the quality of print requires a further adjustment of the flat he can turn knob 161 to whatever new setting he desires without stopping the press. As described above it is sometimes desirable to adjust only one side of the form roller. This can be accomplished as already described, by sliding the knob 161 into one of its other two positions. For example with the knob in the position as shown in FIG. 5 where only the keys 162 are in engagement with keyways 167 on collar 156, only shaft 125 will be rotated by turning knob 161 thereby adjusting only the near side of form roller 107. Or, the knob can be slid into its third position and only shaft 123 can be rotated by turning a pin wrench inserted in bore on collar 157, thereby adjusting only the far side of form roller 107.

Form roller 108 can be adjusted by means of its shaft rotating mechanism which is identical with the mechanism as above described.

FIGS. 7 and 8 schematically show the above described mechanism with a feedback system for determining and indicating to the operator whether or not the form roller requires adjustment. Gear 173 can be fitted with a shaft 184 which extends through frame 101 supported therein by bearing 191. On the other side of frame 101, shaft 184 is attached to a pivot arm 186 by means of pin 190. Attached to the other end of pivot arm 186 there is a shaft 188 of a detector 187. This detector can either be a nylon roller or merely a curved surface which will sit on and ride freely on the form rollers. Torsion spring 185, secured at one end thereof to frame 101 and at its other end to pivot arm 186, urges the pivot arm, and consequently the detector toward the form roller.

As a result of possible swelling or wear of the form roller the detector and the pivot arm 186 will swing in the direction of the radial component of the expanding or shrinking form roller. The rotation of shaft 184 will rotate through a corresponding angle and will cause gear 173 to rotate through the same angle. As a result, gear 172 will cause pointer 169, mounted on dial indicator 168, to shift from its original setting. The operator, realizing that the pointer has shifted from the position he originally set it at, will know that the form roller has swelled and he will therefore proceed to readjust the setting of the form roller flat without having to stop the press by turning knob 161, in any of its three sliding positions, until he is satisfied with the new setting.

What is claimed is:

1. A socket adjustment device for precisely adjusting the position of form rollers of a rotary printing machine ink motion comprising:

a pair of levers, each pivotally mounted at one end thereof about one of two end bushings concentrically supporting a reciprocating ink drum of the ink motion;

a roller socket supported at the other end of each of said levers for supporting therebetween a form roller located between said ink drum and a printing plate cylinder;

a helical gear segment attached to each of said levers;

first and second screw pinions having helical teeth on its periphery for meshing with said lgear segments for causing rotation of each gear segment so as to pivot said levers about its respective bushing thereby adjusting the position of said roller socket;

shaft means supported between the frames of the printing machine with its axis being parallel to the axis of the form roller for carrying said screw pinions;

a mechanism mounted at one end of said shaft means for rotating said shaft means; and

means mounted on the frames of the printing machine for preventing rotation of the screw pinions as the shaft means rotates and for limiting the movements of the screw pinions to axial displacement on the shaft means so as to cause rotation of their respective gear segments attached to said levers thereby adjusting the position of the roller sockets.

2. The socket adjustment device according to claim 1 wherein said shaft means comprises:

a hollow shaft having a threaded portion for carrying said first screw pinion, said hollow shaft extending only part way between the frames;

a solid shaft carried within the hollow shaft and extending between both frames, said solid shaft having a threaded portion on its exposed part for carrying said second screw pinion; and wherein said mechanism for rotating said shaft means is adapted to rotate said hollow shaft and said solid shaft either simultaneously or individually so as to cause axial movement of said first and second screw pinions either simultaneously or individually whereby the roller sockets may be adjusted either simultaneously or individually.

3. The socket adjustment device according to claim 2 wherein said mechanism for rotating the shaft means comprises:

a knob slidably and rotatably mounted on the end of said solid shaft having three sliding positions;

a plurality of keys mounted on said knob;

a first collar mounted on said hollow shaft having a plurality of keyways for meshing with said keys when said knob is slid into a first position so that only said hollow shaft can be rotated as the knob is turned;

an internal gear secured to said knob;

a second collar mounted on said solid shaft having a gear for meshing with said internal gear when said knob is in a second position and said keys are also in engagement with said keyways so that both said hollow shaft and said solid shaft can be rotated as the knob is turned; and

said second collar also having a radially extending bore for receiving a pin wrench when said knob is in a third position with neither said keys or gears in engagement so that only said solid shaft can be rotated by means of said pin wrench.

4. The socket adjustment device according to claim 3 further comprising a visual setting indicator mounted at the end of said shaft means and geared to the rotation of said knob so that when the knob is rotated the indicator will indicate the proper position of rotation of the shaft means for proper precise adjustment of the form roller.

5. A socket adjustment device for precisely adjusting the position of form rollers of a rotary printing machine ink motion comprising:

at least one pair of levers, each lever of a pair pivotally mounted at one end thereof about an end bushing concentrically supporting a reciprocating ink drum of the ink motion whereby each of said supporting bushings supports at least one lever;

a moveable roller socket supported at the other end of each of said levers for supporting a form roller between each of said pairs of sockets, each of said rollers being positioned between said ink drum and a printing plate cylinder;

a helical gear segment secured to each of said levers;

a solid shaft carried in a hollow shaft having a portion thereof extending beyond the end of said hollow shaft, said shaft combination being provided for each pair of levers and having its axis parallel to the axis of said form rollers;

a first screw pinion carried on a threaded portion of each of said hollow shafts for axial displacement as said hollow shaft rotates, said first screw pinion having helical teeth on its periphery for meshing with the gear segment attached to one lever of a pair of levers thereby pivoting said lever about its support bushing so as to adjust the position of the roller socket carried by said lever;

a second screw pinion carried on a threaded portion on the extended part of each of said solid shafts for axial displacement as said solid shaft is rotated, said second screw pinion having helical teeth on its periphery for meshing with the gear segment attached to the other lever of the pair of levers thereby causing said other lever to pivot about its respective support bushing so as to adjust the position of the roller socket carried by said other lever; and

a mechanism mounted at the end of each set of shaft combinations for rotating said hollow shaft and said solid shaft either simultaneously or individually to thereby adjust each roller socket carried by one pair of levers either simultaneously or individually.

6. The socket adjustment device according to claim 5 wherein said mechanism for rotating said hollow and solid shafts comprises:

a knob slidably and rotatably mounted on the end of each of said shaft combinations having three sliding positions;

a plurality of keys mounted on each of said knobs;

a first collar mounted on each of said hollow shafts having a plurality of keyways for meshing with said keys when said knob is slid into a first position so that only said hollow shaft can be rotated as the knob is turned;

an internal gear secured to each of said knobs:

a second collar mounted on each of said solid shafts having a gear for meshing with said internal gear when said knob is in a second position and said keys are also in engagement with said keyways on said first collar so that both said hollow shaft and said solid shaft can be rotated as the knob is turned; and

each of said second collars also having a radially extending bore for receiving a pin wrench when said knob is in a third position with neither said keys or said gears in engagement so that only said solid shaft can be rotated by means of said pin Wrench.

7. The socket adjustment device according to claim 6 further comprising a feedback system for indicating whether each form roller is out of flat and requires adjustment.

8. The socket adjustment device according to claim 7 wherein said feedback system comprises:

a detector resting on the form roller for following variations in the diameter of the form roller;

an indicator mounted on the shaft combination for indicating the relative movement of the detector; and

means connecting the indicator with the detector for transmitting the movements of the detector in response to swelling or wear of the form roller to the indicator.

References Cited UNITED STATES PATENTS 3,065,690 11/1962 Heller et a1 10l-247 XR 3,147,700 9/1964 Martin l01247 XR 3,366,047 1/1968 Hermach et al 101-216 ROBERT E. PULFREY, Primary Examiner. I. REED FISHER, Assistant Examiner.

United States Patent Office 3,440,959 Patented Apr. 29, 1969 3,440,959 COATED POLYMER Richard L. Wagner, Sherwood Park, Del., assignor to Hercules Incorporated, Wilmington, Del., a corporation of Delaware No Drawing. Continuation-impart of application Ser. No. 528,418, Feb. 18, 1966. This application Dec. 14, 1966, Ser. No. 601,577

Int. Cl. B41n 1/00, 3/00 US. Cl. 101453 8 Claims ABSTRACT OF THE DISCLOSURE This is a continuation-in-part of my copending application Serial No. 528,418 filed February 18, 1966, now Patent No. 3,394,200.

As stated above, this invention relates to certain specific polymers coated with a thin layer of silicon monoxide and to a process for preparing said coated polymers which comprises vacuum depositing a thin coating of silicon monoxide on their surface.

Polyolefins, polystyrene, styrene copolymers, blends of polystyrene with styrene-butadiene copolymers, poly (vinylidene chloride), vinyl chloride-vinylidene chloride copolymers, poly(vinyl chloride) and poly[bis(chloromethyl) oxetane] are well known for their ability to be formed into films, sheets, bottles, tubing and other useful articles. However, all of these polymers suffer the disadvantage of picking up static electrical charges, permeability to gases, being difficult to print upon and relatively nonadherent to coatings.

It has now been discovered that the said specific polymers can be made anti-static, less permeable to gases, more receptive to printing and adherent to coatings by vacuum depositing a very thin layer of silicon monoxide on their surface. Quite surprisingly, it has been found that silicon monoxide forms a chemical bond when vacuum deposited on one of the specific polymers listed above but not when vacuum deposited on other polymers such as poly(ethylene terephthalate), polyacetal resin or capran polyamide. The said bond is so tight that when a rupture occurs the failure is in the polymer and not between the polymers and the silicon monoxide coating.

The specific polymers which can be coated in accordance with this invention are the stereoregular polyolefins such as linear polyethylene, stereoregular polypropylene, crystalline ethylene-propylene copolymers, crystalline ethylene-l-butene copolymers, crystalline propylene-l-butene copolymers, crystalline isoprene-propylene copolymers, etc.; polystyrene; styrene copolymers including terpolymers such as acrylonitrile-butadiene-styrene terpolymers; blends of polystyrene with styrene-butadiene copolymers; poly(vinyl chloride); poly (vinylidene chloride); vinyl chloride-vinylidene chloride copolymers; poly [bis(chloromethyl) oxetane] and blends of these polymers with each other. The polymers can, of course, contain additives such as extenders, fillers, dyes, stabilizers, reinforcing materials, etc., but the presence or absence of such additives is immaterial to the invention. While polymers of various shapes and sizes can be coated in accordance with this invention, most preferably the polymers will be in the form of sheets or films. In some cases, it may be desirable to orient the sheet or film by methods known in the art.

The vacuum deposition of the silicon monoxide onto the surface of the said polymers can be carried out using any of the well-known vacuum deposition procedures. The thickness of the coating will be from 3 10- inch, to about 40 10 inch, most preferably from about 8 10- inch, to about 30X l0 inch. The thickness can be controlledby the temperature, the distance of the polymer from the source and the period of deposition. In general, pressure within the vacuum chamber during deposition will be maintained at about 5 l0- millimeters of mercury or less, and the period of deposition will vary with the temperature and the distance of the polymer from the source. If the silicon monoxide coated polymer is to be stored for any length of time, it is usually desirable to apply a protective coating to prevent oxidation or the absorption of materials on the surface. One method of protective coating is simply to dip the coating polymer in an aqueous solution of carboxymethylcellulose .and then allow it to dry. Such a coating can easily be washed away before the coated polymer is to be used.

The coated polymers of this invention are particularly useful as flexible, inexpensive, light-weight lithographic plates, provided the sheet is smooth and the silicon monoxide coating is of the proper thickness. More specifically, the requirements are (1) that the surface of the polymer sheet have no perceptible roughness and (2) that the silicon monoxide coating be of a thickness of from 3 X 10- inch to about 40 10- inch. The thickness of the polymer sheet is not critical but will, in general, be at least about 3 mils and should preferably be uniform to within variation. In certain cases it may be desirable to pigment the sheet. For example, such pigmentation can be used to furnish a contrasting color for the diazo image layer and to reduce halation. As stated above, one requirement is that the sheets be smooth (i.e. have no perceptible roughness). Smoothing of the sheets can be effected by various methods well known in the art as for example calendering, press polishing, molding between smooth plates, extruding onto polished quench rolls, etc.

The lithographic plates of this invention can readily be converted into either positive or negative working plates. For example, a negative working plate can be obtained by coating with a photo resist and exposing through a negative transparency so as to render the photo resist insoluble and oleophilic in the exposed areas. When the non-exposed image is dissolved away, the hydrophilic silicon monoxide surface is laid bare and a negative working plate results. A positive working plate can be made by coating with a photo resist, exposing through a positive transparency and removing the unexposed (soluble) resist as described above to reveal the silicon monoxide coating. By etching away the silicon monoxide coating, the oleophilic area is revealed. Then the exposed (hardened) photo resist is removed, exposing the hydrophilic silicon monoxide surface as a positive working plate. It is also possible to coat a plate with a photo resist containing a material which releases hydrogen fluoride (such as a diazofluoborate) when exposed to light. Such a photo resist would automatically etch through the silicon monoxide coating on exposure thus eliminating a step in the development process.

The following examples are presented for purposes of illustration, parts and percentages being by weight unless otherwise specified.

Example 1 A silicon monoxide coated polypropylene lithographic plate was prepared as follows. An extruded sheet of 0.015

inch thick crystalline polypropylene having a molecular weight of 600,000 was cut into a 10 x 16 inch plate and press-polished until there was no visual evidence of surface flaws.

The smooth polypropylene plate was then placed in a vacuum chamber equipped with five electrically heated tungsten filaments. The plate was mounted in an approximate are around the filaments at a distance of 10-12 inches. Each filament heated a sample of silicon monoxide to its vaporization temperature and was fired independently in series. Deposition time was approximately 2 minutes per filament. The chamber was subjected to a vacuum of 4.5 l-'* mm. during the process. The resulting plate had a l 10- inch coating which was scratch and abrasive resistant.

The silicon monoxide coated lithographic plate was converted to a printing plate by coating with a commercial ink-receptive diazo resin coating. After exposure through an image-bearing transparency and development of the plate, 10,000 copies were run on a lithographic printing press. The resulting prints were of excellent quality. The plate was examined and found to be undamaged, the coating still adhered tightly to the polypropylene substrate.

Example 2 printing plate was used to print 20,000 copies on a lithographic printing press. The prints were of excellent quality and the plate was undamaged.

Example 3 The polypropylene sheet described in Example 1 was press-polished and coated with a 5 10- inch layer of silicon monoxide using the method described in Example 1.

The resulting lithographic plate was converted to a printing plate by coating with a commercial ink-receptive photo resist. After exposure through a positive transparency, the water soluble background areas were removed. The plate was then immersed in 0.75% aqueous hydrofluoric acid for three minutes to etch away the silicon monoxide coating, exposing an oleophilic area. Finally, the hardened resist was removed with an organic solvent exposing the hydrophilic silicon monoxide coating. The resulting positive working plate functioned satisfactorily during a run of 10,000 prints. The plate was examined and found to be undamaged.

Example 4 A sheet of 0.02 inch thick crystalline ethylene-propylene copolymer having a molecular weight of approximately 600,000 and containing 5 mole percent ethylene was cut into a 10 x 16 inch plate and calendered until there Was no visual evidence of surface flaws. The smooth plate was then coated with a 12 10 inch layer of silicon monoxide using the method described in Example 1.

The resulting lithographic plate was converted into a printing plate by coating with a commercial ink-receptive photo resist. After exposure through a negative transparency, the water soluble areas were removed exposing the hydrophilic silicon monoxide coating. The resulting printing plate was used to print 15,000 copies on a lithographic printing press. The prints were of excellent quality and the plate was undamaged.

Example 5 A silicon monoxide coated poly[bis(chloromethyl)- oxetane] lithographic plate was prepared as follows. An extruded sheet of 0.02 inch thick poly[bis(chloromethyl)- oxetane] having a molecular weight of 270,000 was cut into a 10 x 16 inch plate and calendered until there was no visual evidence of surface flaws. The smooth plate was then coated with a 4 10- inch layer of silicon monoxide using the method described in Example 1.

The resulting lithographic plate was converted into a printing plate by coating with a commercial ink-receptive photo resist. After exposure through a negative transparency, the water soluble areas were removed exposing the hydrophilic silicon monoxide coating. The resulting printing plate was used to print 15,000 copies on a lithographic printing press. The prints were of excellent quality and the plate was undamaged.

Example 6 A silicon monoxide coated poly(vinyl chloride) film was prepared as follows. A 1 mil film of poly(vinyl chloride) having specific viscosity of 0.4 as measured by ASTM D-l243-52T was coated with a 5 X 10* inch layer of silicon monoxide using the method described in Example l.

The resulting coated film and an uncoated control were tested for gas permeability according to ASTM D- 1434. The results are tabulated below:

Cc.lsq. In./24 hrs./atm.

Oz 00, N2 35;???iiinifffii jjjjjjjjj: 1 7 i 1 None after 8 hours.

Example 7 Relative humidity Volts after at F., a period of percent 5 minutes Hall life Uncoated control.-. 47 900 Too long to measure. Coated sheet. 47 10 45 seconds. Uncoated contro 12 930 Too long to measure. Coated sheet; 12 65 75 seconds.

I Time in seconds for charge to dissipate to 500 volts. I

Example 8 A silicon monoxide coated polypropylene film was preared as follows. A 2 mil film of crystalline polypropylene having a molecular weight of 600,000 was coated with a 6x10 inch layer of silicon monoxide using the method described in Example 1.

The resulting coated film and an uncoated control were tested for printability by marking with a commercial flexographic ink (polyamide type). After allowing the ink to dry for one hour the marked surfaces were rubbed with a cotton cloth. The mark on the coated film could not be rubbed off, while the mark on the uncoated control was easily removed by rubbing.

Example 9 A silicon monoxide coated lithographic plate was prepared from a 0.02-inch thick extruded sheet of a blend of polystyrene and styrene-butadiene copolymer. The polystyrene had a molecular weight of approximately 300,000 and amounted to of the blend. The styrenebutadiene copolymer had a molecular weight of 300,000 and contained approximately 28% of styrene monomer. 

